Los Hervideros is a natural wonder. This stretch of bizarre-shaped cliffs is just south of El Golfo on the south-west coast.
There is an abundance of underwater caves produced by the solidification of lava and subsequent erosion.
Los Hervideros (literal translation: hot-springs) refers to the amazing display that sees the waves force water into the labyrinth of caves with such power that it appears as if the sea is bubbling and boiling.
Sometimes, when the sea is rough and producing heavy swells, sprays of seawater are forced several metres into the air accompanied by a roaring noise!
Reference: http://www.spain-lanzarote.com/en/places/south/los-hervideros.html